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Shear horizontal surface acoustic wave induced microfluidic flow

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6 Author(s)
Brodie, D. S. ; School of Engineering and Physical Sciences, Institute for Integrated Systems, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom ; Fu, Y. Q. ; Li, Y. ; Alghane, M.
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In this letter, we demonstrate that surface acoustic waves (SAWs) excited on 36°Y-X LiTaO3 have both Rayleigh and shear horizontal components, which can result in different acoustic streaming patterns in micro-droplets. The shear horizontal surface acoustic wave streaming pattern exhibits a quasi-stable counterflow in the SAW propagation direction with velocities of up to 16 mm/s, with minimal damping observed within the droplets. A pumping function was realized at a threshold power of 30 dBm with a large rotation vector on hydrophobically treated devices.

Published in:

Applied Physics Letters  (Volume:99 ,  Issue: 15 )

Date of Publication:

Oct 2011

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